The almost post-apocolyptic style processing is a clever idea for the challenge, but I feel you needed to use it with a touch more subtlety - in particular, the horizon has a bright halo that I find somewhat distracting.
Lovely editing! Very nicely done! It does show "harshness" and it is a wonderfully skilled editing piece but, somehow, it kind of lacks something that I can't quite put my finger on. It's likely just my personal tastes. Doesn't make me right. Just my personal opinion only.